Color

#171bfd

#171bfd
hex#171bfd
rgbrgb(23, 27, 253)
hslhsl(239, 98%, 54%)
oklchoklch(0.465 0.301 265.9)
Closest name: blue (#0000ff)Relative luminance 0.0806

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#fdf917

#178efd · #8617fd

#fd171b · #1bfd17

Split-complementary

Open in tool →

#fd8617 · #8efd17

#fd178e · #fdf917 · #17fd86

Contrast

#171bfd as textRatioAAAA largeAAAFix
Aaon white
8.04:1passpasspassPasses AAA — no fix needed.
Aaon black
2.61:1failfailfail
  • AA: use #5d60fd as the text (4.56:1)
  • AAA: use #8b8dfe as the text (7.34:1)
  • AA: or shift the background to #c2c2c2 (4.51:1)
  • AAA: or shift the background to #f0f0f0 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #171bfd as the background.

Brands using this color

Fonts for this mood

#171bfd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #171bfd
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #171bfd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/171bfd-a09cc4-df964e-251f2d-e9edf1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md